Analytical electron microscopy study of Ni/Ni-8 mol% Ti diffusion couples

N. Komai, M. Watanabe, Z. Horita, T. Sano, M. Nemoto

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Abstract

Analytical electron microscopy (AEM) has been applied to the interdiffusivity measurements and microstructural observations in Ni/Ni-8 mol% Ti diffusion couples. The high spatial resolution attained by AEM revealed that there is an effect of annealing atmosphere on the concentration profiles and microstructures within a range of several microns around the Kirkendall interface: the distortion of concentration profiles and the formation of Ti-rich particles and/or regions were observed near the interface. The interdiffusivities measured using the Sauer-Freise technique from the concentration profiles without the effect of annealing atmosphere were in good agreement with the reported values of the interdiffusivities and the impurity diffusivities of Ti in Ni, but were higher by an order of magnitude than the self-diffusivities of Ni in Ni.

Original languageEnglish
Pages (from-to)4443-4451
Number of pages9
JournalActa Materialia
Volume46
Issue number12
DOIs
Publication statusPublished - Jul 24 1998

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

Cite this

Komai, N., Watanabe, M., Horita, Z., Sano, T., & Nemoto, M. (1998). Analytical electron microscopy study of Ni/Ni-8 mol% Ti diffusion couples. Acta Materialia, 46(12), 4443-4451. https://doi.org/10.1016/S1359-6454(98)00081-0